Leakproof stopper



`luly Z9, 1947. J. J. A. JACKSON LEAKPROOF STOPPER A Filed Sept. 14,1945 fa/nays' Having thus described the invention, what is claimed is:

1` A stopper to be used in a container, oomprising a body portion, atubular insert in said body portion, said insert having a longitudinalpassageway therethrough and the insert extending entirely through thebody portion from end to end thereof for the escape of air and gasesfrom the container, said insert having anen.A

largement at its upper end with lanl axiallyf threaded bore, a valveseat at the inner end of the threaded bore, a valve axially adjustablein the threaded bore Within the enlargement for opening and closing saidlongitudinal passageway, said valve being in the form of a screw ladapted to be controlled by the valve, said enthreaded into the bore,and said enlargement having a vent communicating with the bore and',`

adapted to be controlledfby the valve. k

2. A stopper to be used in a container, comprising a body portion, atubular insert in said body portion, said insert having a longitudinalpassageway therethrough and the insert 'extending entirely through thebody portion from `end to end thereof for the escape of air and gasesfrom the container, said insert having an enlargement at its upper endwith an axially threaded bore, a valve seat at the inner end of thethreaded bore, a valve axially adjustable in the threaded bore withinthe enlargement for opening and closing said longitudinal passageway,said valve being in the form of a screw threaded into the bore, and saidenlargement having a vent communicating with the ,bore and adapted tobe` controlled by the valve, said enlargement beingV wholly countersunkinto the outer end of the body portion and said enlargement alsocontaining the vent opening and valve seat and carrying the valve, saidenlargement further having a top face iiush with the top of the stopper,said vent extending from the bore to the top face of the enlargement.

3. A stopper to 'be used in a container, comprising a body portion, atubular insert in said body portion, said insert having a, longitudinal@largement being Wholly countersunk into the outer endof the bodyportion and said enlargement also containing the vent opening and valveVVseat and carrying the valve, said enlargement further having a topface iiush with the top of the stopper, said vent extending from thebore to the top face of the enlargement, the inner end of the tubularinsert being externally threaded, a correspondingly axially threadedcollar detachably secured to the inner end of the insert to hold thetubular insert with leak-tight fitting in the :body portion.

JACK J. A. JACKSON.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS

